Just check coupons out (with price alert and history). What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Power source: 260mAh battery, Waterproof IPX7, Sonic vibrating 40000 strokes per minute
Price history and price alert
Do you need price history chart (for all/most countries) for Teeteck SG-949 Sonic Toothbrush With 3 Heads? There we go.
Price records source(s): Gearbest
Click on image to enlarge.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).